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Buccal Fat Pad-Derived Stem Cells for Repair of Maxillofacial Bony Defects.

Aim: The purpose of this study was to evaluate the use of buccal fat pad-derived stem cells (BFPSCs) as a source for full thickness bone defect repair secondary to pathology in maxilla or mandible.

Methods: Fat-derived stem cells were isolated from buccal fat pad, differentiated into osteocytes in osteogenic medium, and seeded onto human bone defects. Autologous buccal fat pad was harvested and BFPSCs cultured within 4-6 weeks. Bone defects secondary to enucleation of pathologic cyst or tumors were reconstructed with osteogenically differentiated fat-derived stem cells. Hematoxylin and eosin staining, immunohistochemical staining for osteocalcin, alkaline phosphatase and genotypic and phenotypic marker analysis, and histomorphometric measurements of new bone were performed.

Results: Maxillofacial bone defects were successfully reconstructed by BFPSCs, which after implantation at an in vivo site yielded faster osseous regeneration. BFPSCs were associated with superior bone density formation, better blending of margins with enhanced bone trabecular formation, well-organized and well-vascularized lamellar bone with Haversian channels and osteocytes resulting in superior functional and cosmetic results with better quality of life and with significant decrease in secondary complications.

Conclusion: Buccal fat pad is an ideal tool in the hands of an oral and maxillofacial surgeon for tissue engineering and clinical use requiring bone tissue growth and repair, secondary to large osseous defects. This study demonstrates the feasibility of reconstructing bony defects with fat-derived stem cells.

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